table.alumno {
    border-collapse: collapse;
}

table.alumno thead td, table.alumno thead th {
    padding: 8px;
}

table.alumno tbody td, table.alumno tbody th {
    padding: 4px 8px;
}

table.alumno th.crud, table.alumno td.crud {
    width: 20px;
}

table.alumno a img {
    border: none;
}

table.alumno td, table.alumno th {
    border: 1px solid #cccccc;
}

table.alumno tbody tr:nth-of-type(odd) {
    background-color: #fefefe;
}

table.alumno tbody tr:nth-of-type(even) {
    background-color: #eaf4fd;
}

table.alumno tbody tr:hover {
    background-color: #ffff80; 
}